Home / 5,378.40-7,421.82-3,609.72

Finding the Fourth Proportional to 5,378.40, 7,421.82 and 3,609.72

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Solution

The fourth proportional to 5,378.40, 7,421.82 and 3,609.72 is: 4,981.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.40 : 7,421.82 = 3,609.72 : x
  2. Step 2: Convert to fraction form
    5,378.40/7,421.82 = 3,609.72/x
  3. Step 3: Cross multiply
    5,378.40x = 7,421.82 × 3,609.72
  4. Step 4: Simplify right side
    5,378.40x = 26,790,692.09
  5. Step 5: Solve for x
    x = 26,790,692.09/5,378.40
  6. Step 6: Final answer
    x = 4,981.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.